In the ladder diagram of a control process __________.
A) current-actuated devices (power consuming devices), such as relay or valve solenoids or pilot lights are never placed or wired in series with each other, because all of these devices have the same voltage rating as the control voltage.
B) when switches or auxiliary contacts are wired in parallel to each other in adjacent rungs of the ladder diagram that are made common to a single rung, an OR function (gate) is formed: the switches or auxiliary contacts in the parallel OR-gate configuration supply a common control line which normally supplies a light or solenoid.
C) switches or the auxiliary control contacts of relays, contactors, or motor starters may be wired in series in a single rung of the ladder diagram to form an AND function (gate) to control another relay, contactor, or motor
D) switches or other contact devices, which do not consume power but rather direct the flow of electrical current to the power consuming devices, are always placed in series with the lights or solenoids they control.
E) All of The answers
F) Each rung in the ladder is in parallel with every other rung in the same ladder. In other words, all the control lines are in parallel from (across) a common control-voltage source.
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